Sonoelastography is a general term encompassing all ultrasound-based techniques that map tissue mechanical properties, particularly stiffness. It includes strain elastography (qualitative, operator-dependent compression) and shear wave elastography (quantitative, ARFI-based). Sonoelastography is increasingly integrated into standard ultrasound workflow for liver fibrosis staging, thyroid nodule risk stratification (integrated into TIRADS scoring), breast lesion characterization (BI-RADS), and musculoskeletal tendon assessment. It provides functional information that complements conventional morphologic ultrasound imaging.